My guess is that Bill Plemmons deals only in new camper/motorhome parts. A call to them would clear that up though.
I do not know if they offer used stuff there I do know that they have new stuff there you might be better off posting on Craigslist or your local Town page and see if somebody close to you might have it. You can also do a search on eBay for used parts.
Thanks! Your answer is awaiting moderation.